T3 - involves any of ipsilateral pleural sufaces with at least one of the following: 1) invasion of the endothoracic fascia, 2) invasion into mediastinal fat, 3) solitary focus of tumor invading the soft tissues of the chest wall, 4) non-transmural involvement of the pericardium

T4 - involves any of ipsilateral pleural surfaces with at least one of the following: 1) diffuse or multifocal invasion of soft tissues of the chest wall, 2) any rib involvement, 3) invasion through diaphragm to the peritoneum, 4) invasion or any mediastinal organs, 5) direct extension to the contralateral pleura, 5) invasion into the spine, 6) extension to the internal surface of the pericardium, 7) pericardial effusion with positive cytology, 8) invasion of the myocardium, 9) invasion of the brachial plexus